Electrochemical discharge machining device and method based on force feedback control feeding system

Abstract

The invention discloses an electrochemical discharge machining device and an electrochemical discharge machining method based on a force feedback control feeding system, and belongs to the field of special machining. According to the device and method, a tool electrode is fixed on a Z-axis of a machine tool through a clamp; a force sensor is installed on the Z-axis of the machine tool; the force sensor is connected with a data acquisition card; the data acquisition card is introduced into a machine tool numerical control system; the machine tool numerical control system controls the electrochemical discharge and feeding through a machine tool servo system; the force sensor detects a contact force signal of the tool electrode with a workpiece; after being subjected to relevant processing, the signal is acquired by the data acquisition card and accessed into a numerical control system; and the numerical control system then controls the feeding or withdrawing of the electrochemical discharge machining according to the signal. If the contact force is smaller than a set reference force, the system feeds in a set feeding speed; and if the contact force is larger than the reference force, the system withdraws for a certain distance in a set withdrawing speed.

Description

technical field [0001] The invention relates to a device and method for micromachining non-conductive brittle materials in the field of special processing, in particular to an electrochemical discharge processing device and method based on force feedback control feed system. Background technique [0002] In recent years, non-conductive brittle materials, such as various glasses and ceramics, have been widely used. Glass materials have the characteristics of chemical corrosion resistance, transparency, low conductivity and good biocompatibility, so they are used in micro Accelerators, micro-reactors, micro-pumps, medical devices and optical systems; and ceramic materials have excellent properties such as high strength, high hardness, high temperature resistance, wear resistance, corrosion resistance, and good insulation. They are used in mechanical electronics, aerospace, The fields of chemical machinery, ceramic engines, bioceramics and precision instruments are increasingly...

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Problems solved by technology

Although gravity feed can ensure that the feed rate is equal to the speed of hole processing, after a certain depth of machining, the tool electrode is close to the workpiece in gravity feed, while the discharge of electrochemical discharge machining occurs between the tool electrode and the electrolyte solution, requiring machining There is a certain electrolyte solution and insulating gas film gap between the end surface of the tool electrode in the hole and the bottom surface of the hole on the workpiece. Gravity feeding cannot provide the fresh electrolyte solution and insulating gas film gap required for electrochemical discharge machining, and the machining of the tool electrode end surface is very difficult. It is difficult to continue, the processing speed is greatly reduced, the side discharge of the tool electrode is intensified, and the quality of the processed hole is reduced

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